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CVE-2020-25757

22
FAUCET Score

CVE-2020-25757 is a critical vulnerability affecting D-Link DSR VPN routers (DSR-150, DSR-250, DSR-500, DSR-1000AC with firmware 3.14 and 3.17). It stems from insufficient input validation and access controls in Lua CGIs, allowing for arbitrary command execution with root privileges. With a CVSS score of 8.8 (HIGH), this vulnerability can be exploited by an unauthenticated attacker over the network with low attack complexity, leading to complete compromise of confidentiality, integrity, and availability. Its EPSS score is low, indicating a low probability of exploitation in the wild. Currently, there is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit, Nuclei, or ExploitDB. The vulnerability has garnered minimal community discussion and media coverage, suggesting a low profile despite its high severity.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.17CPE matchmatch criteria
cpe:2.3:o:dlink:dsr-150_firmware:*:*:*:*:*:*:*:*
<= 3.17CPE matchmatch criteria
cpe:2.3:o:dlink:dsr-150n_firmware:*:*:*:*:*:*:*:*
<= 3.17CPE matchmatch criteria
cpe:2.3:o:dlink:dsr-250_firmware:*:*:*:*:*:*:*:*
<= 3.17CPE matchmatch criteria
cpe:2.3:o:dlink:dsr-250n_firmware:*:*:*:*:*:*:*:*
<= 3.17CPE matchmatch criteria
cpe:2.3:o:dlink:dsr-500_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.04%
Probability of exploitation in next 30 days
EPSS Percentile
79.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0204 is in the 88th percentile among its peer group of 1,875 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

supportannouncement.us.dlink.com / announcement/publication.aspx
Vendor Advisory
digitaldefense.com / news/zero-day-vuln-d-link-vpn-routers
Third Party Advisory
dlink.com / en/security-bulletin
Vendor Advisory